The most easy way to get started with vmware server is to use the sme server as a host system and to use the contrib and the howto.
http://wiki.contribs.org/Vmware (Last time I tried it, it worked perfect for me, but it is a while ago.)
Then it is also possible to run a virtual sme test server or something else under sme server / vmware.
One thing that can be confusing is that a virtual installation made under Vmware workstation will not work under Vmware server. So if you receive or download a virtual server image someone else has made (with Vmware workstation) it might/will not work.
The safe way is to use the howto, and to install a new virtual server from the CD on the server.
During the installation of a virtual server you will get the option of selecting a scssi or a IDE harddisk.
Doing the incorrect choice will later give the message:
error: can not fine hard drive
vmware server 1.xx
(At least it happened to me.)
I don't remember whcih are the right chise, try both.
Of course you will need the Vmware virtual console to work from.
Later on it can be an idea to use an other (Linux) host system than the sme server, but this will be slightly more difficult.